Schwing 30100750, Руководство по эксплуатации

Страница: 88 / 164

Operation
Operation Manual - All S P Rock Valve Model s 86 revD a te
To di s able the entire unit in an emergency
If an emergency arises that requires that the hydraulic
system be disabled completely, for example if a hose or
fitting broke, you must stop the engine. If you are faced
with this, do not hesitate or investigate first. Shut off
the engine, then investigate. It is recommended that a
long length hose of each of the possible 4 diameters be
kept with the unit for such emergencies. See page 4 of
the Appendix (Section 7), for a list of the 4 hose
diameters, and the recommended length of each for
emergency use.
If you lose electricity on the unit for any reason, the
dump valve will open. This will route oil from the
hydraulic pump directly back to the tank. This is also
what happens when any emergency stop button is
pushed. To continue pumping, you will have to find out
what happened and fix it. If you cannot find out what
has happened within 10 minutes or so, you will have to
take action to prevent the concrete from setting up or
freezing. For information on where to look and what to
do if you lose electricity on the unit, contact the
Schwing Service Department at (651) 429-0999.
Delay s
There will be delays. Sometimes you will have to wait
for concrete, sometimes the workers will be scrambling
to finish the next form to be pumped, sometimes a form
will fail through no fault of your own, or half a dozen
other reasons. You can make good use of this idle time
by washing pipe, clamps and gaskets that have been
removed from the delivery system, washing splashed
concrete from your hopper area, eating lunch or
whatever. The important thing to remember is that
concrete begins to set as soon as it becomes
motionless. Every 5 minutes or so, give the pump a
stroke, which will make the concrete in the elbows and
reducers change their shape, thus breaking the set. If
you have to wait more than one or two 5 minute
periods, you will have to continue differently for
different situations. In either case, remember this:
Concrete settin g in the p i p e a cts like a block ag e.
Block ag es c a n be da n g ero u s, bec au se the pu m p
will cre a te m a xim u m p ress u re on the concrete.
If you are waiting for concrete to arrive,
Do not let
the ho pp er become less th a n h a lf f u ll.
If the
concrete is getting stiff, add water to the hopper while
you are waiting. A word of warning regarding this
procedure...The concrete will eventually set up
anyway. If you have to wait so long that the concrete is
setting, it would be better to clean out and start over
when the fresh concrete has arrived. This has the added
advantage of making Murphy’s Law work for you...as
soon as you begin to clean out, the concrete will arrive.
If you are waiting for a form to be finished or repaired,
or anytime that the delay has nothing to do with
waiting for concrete, you can give the pump one or two
strokes in 5 minute intervals for a longer time, because
the ready mix truck will be able to refill your hopper.
Be careful about where the concrete is going when you
are giving the machine these one or two stroke cycles.
If the form is broken, you will be complicating matters
by putting more concrete in there. Eventually, you have
to make the call...once concrete begins to set while it is
being pumped, you have only minutes to get the
machine cleaned out. For this procedure, see the
chapter on clean-out. Another thing to consider is the
condition of the concrete in the ready mix trucks. If
you have 3 or 4 trucks lined up behind the pump and
they have been waiting with you, their concrete is also
setting. Let’s say you have been waiting for 45 minutes
while a form is being repaired. The ready mix plant is
25 minutes away from the job, and the driver was
waiting to get to your pump for 35 minutes before the
form broke. His concrete is now an hour and 45
minutes old. If it is a hot day, you are risking a “pipe
party” by pumping his concrete. You are the one that
has to make the call. Hey, nobody said the job would be
easy, did they?
Keep the waterbox full
Don’t forget to check the water in the waterbox
regularly (and don’t forget to stop the pump before you
open the waterbox covers). The water is very important
for cooling the differential cylinders, and lubrication of
the rubber rams.
U s e of the vibrator
If you are pouring very stiff concrete and it isn’t
flowing well through the hopper grate, turn on your
vibrator. If you didn’t buy a vibrator with the unit, they
are available for field retrofit. Under no circumstances
should you remove the hopper grate while the machine
is operating, nor should the machine be operated when
the grate is not in place. You wouldn’t believe some of
the stuff that comes out of ready mix trucks. Mixer fins,
clumps of unmixed cement, cats, dogs, rebar, golf
clubs (you have to assume someone had a very bad
round), tools of all sorts, etc. Your grate will catch it
before it goes into the hopper (providing it is in place).
Home TOC TOC Print Print